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Photostimulated aggregation of ultradispersoidal silver particles into fractal clusters

V V Slabko, S V Karpov, V I Zaitsev, G Zhenhua, A K Popov, L Zaiguang, L Dongsheng, F Yongchang and A Chengwu

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In this paper, studies of the photostimulated aggregation of ultradispersoidal silver particles into fractal clusters observed in colloidal solutions irradiated by different types of pulsed and continuous-wave lasers and by non-monochromatic light are described. A photoaggregation mechanism is suggested, on the basis of mutual opposite charging of different sized particles due to the equalization of their size-dependent Fermi energies in a conducting medium.


PACS

61.43.Hv Fractals; macroscopic aggregates (including diffusion-limited aggregates)

61.80.Ba Ultraviolet, visible, and infrared radiation effects (including laser radiation)

61.82.-d Radiation effects on specific materials

Subjects

Condensed matter: structural, mechanical & thermal

Dates

Issue 39 (27 September 1993)



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